707 CE/P4ADBC
Miniature Super Precision Angular Contact Ball Bearings
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707 CE/P4ADBC Bearing Product Overview & Core Advantages
The 707 CE/P4ADBC is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This metric bearing features a back-to-back (DB) matched arrangement and a Moderate (Class C) preload, enabling it to withstand significant combined loads (radial and axial) from both directions. Manufactured to the stringent P4A tolerance class, it offers superior running accuracy, making it ideal for high-speed, high-reliability spindles and precision machinery where minimal runout and high system stiffness are critical.
707 CE/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 707 | Basic bearing series, defining the cross-sectional dimensions and internal design. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| E | Indicates an optimized internal design, often referring to a reinforced structure and increased load rating. |
| P4A | Denotes a very high precision tolerance class, exceeding ABEC 7 standards, for applications requiring extreme running accuracy. |
| DB | Signifies the bearings are supplied as a Duplex Back-to-Back matched set. This arrangement provides high moment rigidity and can accommodate axial loads from both directions. |
707 CE/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Moment Load Capacity: The back-to-back (DB) duplex arrangement creates a wide effective spread between load centers, significantly increasing the bearing set's resistance to moment loads and providing high system stiffness. The Moderate preload (Class C) eliminates internal clearance, ensuring precise shaft positioning and enhanced rigidity under operating conditions.
Superior High-Speed Performance: The phenolic resin cage is lightweight and possesses excellent sliding properties, reducing centrifugal forces and friction at high rotational speeds. This, combined with the 15° contact angle, allows the bearing to achieve a high limiting speed of 230,000 rpm.
Precision & Accuracy: Manufactured to P4A tolerance class with tight dimensional control on the bore diameter (7 mm), outside diameter (19 mm), and width (12 mm), this bearing ensures minimal vibration and precise rotational performance.
High Load Capacity: With a dynamic load rating of 702 lbf and a static load rating of 286 lbf, this bearing is engineered to handle demanding combined radial and axial loads.
707 CE/P4ADBC Bearing Typical Application Areas
This high-precision duplex bearing is engineered for advanced applications where accuracy, speed, and rigidity are paramount. Key industries and equipment include:
- High-Frequency Spindles for PCB drilling and precision machining
- Machine Tool Spindles in grinding, milling, and turning centers
- High-Speed Automation & Robotics (e.g., robot arm joints, direct-drive motors)
- Precision Medical & Dental Equipment (e.g., high-speed handpieces, scanners)
- Aerospace Instrumentation and navigation systems
